在《人类环境杂志》上发表的一项研究称，科学家们发现，自引进无铅汽油以来，美国东北部土壤中的铅含量已经显著下降。
In a study published in the journal Ambio, scientists found that lead levels in soil in the North-eastern United States had decreased markedly since the introduction of unleaded gasoline.
在《清洁空气法案》强制要求美国使用无铅气体的二十年里，铅在世界范围内的累积量显著下降。
In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.
事实上，周末我去餐馆吃中饭，点了鲈鱼，他们问我，是喜欢普通的还是无铅的。
In fact, when I went to lunch this weekend and ordered the sea bass, they asked if I wanted it regular or unleaded.
铼可以用来制造喷气式发动机的耐高温合金部件，也是高能量的无铅汽油的成分。
Rhenium is used to make high-temperature alloys for jet engine parts and in high-octane, lead-free gasoline.
旧的家庭用的是铅管，但是即使是新的无铅水管装置在焊接接头的铜管件或水龙头或铜管中也含有铅。
Older homes may have lead pipes, but even new plumbing that's lead free can still contain lead in brass fitting or faucets or in copper pipes with soldered joints.
每个艺术花盆都是定制的。它们由手工制作的玻璃和无铅焊料接合而成，交付使用时，万事俱备，只欠花卉。
Each sculptural planter is made-to-order with handmade glass and lead-free solder and comes with everything you need but the plants.
汽车排放的尾气严重污染了达卡的空气，随着无铅汽油的出现略改善了空气的质量，但是有毒的一氧化碳气体依旧存在着。
Dacca's air is burdened by vehicleemissions; air quality improved after the advent of unleaded gasoline, but toxins such as carbon monoxide persist.
最后介绍了一些有关最新的无铅产品的可靠性保证方面的内容。
Finally we introduce some contents about the reliability ensure for the lead-free products.
笔者就近年来国内外开发的无铅焊料、焊点的失效模式、焊点可靠性评价方法和焊点的主要缺陷进行了综述；
Research progress of lead-free solder, invalidation models of solder joint, solder joint reliability evaluation and the defects of solder joints in recent years have been reviewed.
这种产品的推出是为了在漆膜中无重金属(即铅合铬)的情况下，更好的满足汽车工业防腐的要求。
This product was formulated to meet the automotive industry corrosion requirements without the use of heavy metals (namely lead and chrome) in the paint film.
无论是环境的要求还是作为竞争的筹码，无铅钎料在表面组装领域中的应用已经是不可回避。
It is unavoidable that lead-free solders are applied in SMT field in view of the environmental protection and the competitive motivation.
随着微电子表面组装技术的迅猛发展，软钎料尤其是无铅钎料逐渐成为研究的焦点。
The solder alloys especially the lead-free solder alloys become the focus of study because of the quick development of the microelectronics and the surface mount technology (SMT).
甲基叔丁基醚(MTBE)作为一种新型的无铅汽油添加剂被广泛应用以减少含铅汽油对空气的污染。
Methyl tert-butyl ether (MTBE) is widely used as an addictive in unleaded gasoline to curb the air pollution caused by leaded gasoline.
有了燃料，无论你往油箱里加的是什么牌子的无铅燃料，你大可期待你的车有相同的表现。
With fuel, you can reliably expect the same performance from your car no matter what brand of unleaded you put in your tank.
结果表明，密着性能优良的无铅建筑铝搪瓷界面存在铝元素与瓷釉元素相互扩散的中间过渡层；
The results show that there is an interlayer, which is developed at the interface due to the interdiffusion of aluminium element and enamel elements .
本文在无标样的情况下，用X射线荧光基本参数法测定了焊锡中的锡和铅的含量。
We have determined tin and lead contents in tin solder using the XRF fundamental parameter method without standard sample in this paper.
的乙醇与15%的无铅汽油混合就形成了另一种非传统性汽油燃料(e85)。
An alternative ethanol fuel blend consists of 85 percent ethanol, and 15 percent unleaded gasoline (E85).
通过严格执行无铅工艺，我们将持续提高我们的产品品质，一如既往地满足客户的需求。
Through the strict implementation of lead-free technology, we will continue to improve our product quality and continue to meet customer demand.
在再流焊无铅化过程中，再流焊的有铅要素与无铅要素的兼容性直接影响产品质量。
In the course of the lead free reflow soldering, lead and lead free of reflow soldering affect the quality of product.
在无铅化进程中，由于无铅焊点焊料的不同和焊接工艺参数的调整，必然会给焊点可靠性带来许多新的影响。
In the process of lead-free, because of the difference of lead-free solders and adjustment of technical parameter, we will face many new problems of reliability.
这篇论文详细报道了无钴、无铅及有利于环境的排气阀座圈的开发与使用。
This paper reports the development and the application detail of cobalt-free, lead-free and environmentally friendly exhaust valve seat insert.
催化转炉减少了一氧化碳，氧化氮和挥发性有机混合物等的排放，而且无铅燃料的应用也当成为必要。
Catalytic converters reduce carbon monoxide, oxides of nitrogen, and volatile organic compounds in emissions and necessitated the use of lead-free fuel.
为了预测跌落碰撞下球栅阵列(BGA)封装中无铅焊点的失效，采用ABAQUS软件来模拟跌落碰撞过程中焊点的应力分布。
In order to predict failure location of BGA lead-free solder joints under a drop impact, ABAQUS software is used to analysis stress distribution of the solder joints.
这项研究的主要目标之一是建立一个通用的热机械为无铅焊料的耐久性模型。
One of the main objectives of this study is to develop a generic thermo-mechanical durability model for Pb-free solders.
影响焦化汽油调合生产90 号无铅汽油质量的主要因素是焦化汽油的馏程、辛烷值、实际胶质和硫醇硫的含量。
The major influencing factors of blending coker naphtha for 90 RON unleaded gasoline are its distillation range, octane number, existent gum and mercaptan content.
文中介绍了三种典型无铅焊料体系的不足之处，以及银导电胶研究中的三个难题。
The disadvantages of three typical lead-free solders, and three problems in the conductive adhesive study are discussed.
介绍了自还原法制备低温无铅铜红釉的工艺方法、工艺参数以及影响铜红釉呈色效果的因素。
Introduce technic method, technic parameters, and factors which affect the color of the glaze of low-temperature no-lead red copper glaze by using self-destruction.
本文介绍了一种适用于“无铅”焊接的复合基cem - 3覆铜板的研发。
The article introduces a kind of composite material CEM-3 of CCL for lead-free soldering.
本文介绍了一种适用于“无铅”焊接的复合基cem - 3覆铜板的研发。
The article introduces a kind of composite material CEM-3 of CCL for lead-free soldering.
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